Research Papers

Investigation of Street Lamp With Automatic Solar Tracking System

[+] Author and Article Information
Siyuan Lu, Rong Dai

School of Mechanical Engineering,
Jiangsu University,
Zhenjiang 212013, China

Guangru Zhang

State Key Laboratory of Materials-Oriented
Chemical Engineering,
Nanjing Tech University,
Nanjing 210009, China

Quan Wang

School of Mechanical Engineering,
Jiangsu University,
Zhenjiang 212013, China;
State Key Laboratory of Transducer Technology,
Chinese Academy of Sciences,
Shanghai 200050, China
e-mail: wangq@mail.ujs.edu.cn

1Corresponding author.

Contributed by the Solar Energy Division of ASME for publication in the JOURNAL OF SOLAR ENERGY ENGINEERING: INCLUDING WIND ENERGY AND BUILDING ENERGY CONSERVATION. Manuscript received August 20, 2017; final manuscript received March 22, 2018; published online April 16, 2018. Assoc. Editor: Geoffrey T. Klise.

J. Sol. Energy Eng 140(6), 061002 (Apr 16, 2018) (7 pages) Paper No: SOL-17-1343; doi: 10.1115/1.4039776 History: Received August 20, 2017; Revised March 22, 2018

A street lamp with automatic solar tracking system can control the adjusting mechanism of azimuth and altitude so that the solar panel may adapt itself to the sunlight to improve the photoelectric conversion efficiency. In this work, we demonstrated the design of the adjusting mechanism of azimuth and altitude and verified the wind resistance. The method was realized by capturing the incident direction of sunlight using the photodiode array. The signal of the photodiode array can be processed by LM339N and then was sent to the single chip, which can deal with the signal to the motor of the adjusting mechanism of azimuth and the linear actuator of the adjusting mechanism of altitude, respectively. The hall sensors, embedded in the adjusting mechanism, are utilized to fulfill the feedback of the motion position to the single chip. These results clearly reveal the potential of the system in application.

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Fig. 1

Schematic diagram of the azimuth adjusting mechanism: (1) the first hinge mount, (2) magnet, (3) sensor bracket, (4) screw, (5) DC geared motor, (6) lamp holder, (7) motor fixed plate, (8) connecting pipe, (9) rigid coupling, (10) the first tapered roller bearing, (11) stationary cylinder, (12) the second tapered roller bearing, (13) the first cover of weatherproof, (14) the second cover of weather-proof, (15) twisting hollow shaft, (16) hinge bracket, and (17) top cover

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Fig. 2

Schematic diagram of the altitude adjusting mechanism: (1) electric drive pusher, (2) solar panel, and (3) the second hinge bracket

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Fig. 3

The azimuth adjusting mechanism bearing wind force load diagrammatic drawing

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Fig. 4

Photodiode array diagrammatic drawing

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Fig. 5

Photodiode array connection diagram

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Fig. 6

LM339N and photodiode array connection diagrams

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Fig. 7

Hall sensors distribution schematic drawing in the azimuth adjustment mechanism: (1) magnet, (2) rigid coupling, (3) hall sensor a, (4) hall sensor b, (5) hall sensor c, (6) hall sensor d, and (7) hall sensor e

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Fig. 8

Schematic diagram showing motor drive circuit

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Fig. 9

Schematic of day and night identification circuit module

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Fig. 10

MCU executive program flowchart

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Fig. 11

Photo of solar street lamp with automatic tracking sunlight incident direction



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